These functions convert text values to specific syntax object types, deriving
syntax object properties from the stx argument. They concatenate each
text argument, adding before and after to the front
and back of the result and between between each argument.

3.2Regular Expressions

This module provides tools for building strings which can be compiled to regular
expressions. In particular, the constructors wrap their arguments in
appropriate delimeters to prevent misparsing after concatenation.